* Use curl to validate the IPN with HTTP/1.1.
* Check $user->uid is set before testing its value against $account->uid.
* Remove lm_paypal_subscription_access() and simply check for 'administer lm_paypal' permission.
* 1189638: Pass lm_paypal_subscribe_select() the arguments its expecting.
* Add notify_url to the common elements.
* Add a sample payment block, better form handling.
* Convert Thank You page to a themed item.
* Remove field-specific validation check. Done in the FORM_NAME_validate() function instead.
* Use SSL & HTTP/1.1 to verify the IPN.
* #1369604 by Brian Altenhofel: convert install file to UNIX line endings
* Add an 'Action' header to admin/lettings/lm_paypal/subscribers/0
* #331510 by lyricnz: Don't display subscription in your user profile if you can't subscribe.
* PGSQL compatibility fixes #112317: PostgreSQL Support Needed
* Don't t() a string passed to watchdog().